Concrete form



Aug. 15, 1933. J. N. HELTZEL CONCRETE FORM Filed Aug. 27, 1928 Fl [3. E.

Patented Aug. 15, 1933 v UNITED STATES PATENT OFFICE 1,922,584 CONCRETE FORM John N. Heltzel, Warren, Ohio Application August 27, 1928. Serial No. 302,390 7 Claims. (01. 25-118) The present invention relates to concrete forms, such as are used in road building, and one object of the invention is the provision of novel and improved face rail or form member to form the face of a curb,,with a groove between the curb and road slab for receiving sealing material which will prevent water from passing down between the curb and road slab.

Another object of the invention is the pro vision of a novel and improved device for securing one form rail on another form rail, in superimposed relation.

With the foregoing and other objects in View, which will be apparent as the description proceeds, the invention resides in the construction and arrangement of parts, as hereinafter described and claimed, it being understood that changes can be made within the scope of what is claimed, without departing from the 'spiritof the invention.

The invention is illustrated in the accompanying drawing, wherein Figure 1 is a prospective view of one embodiment of the improvements, the rails or form members being shown in section. I

Fig. 2 is a section of the curb and slab showing the sealing material in the groove between them.

Fig. 3 is a cross section of the back rails showing the clamping device therefor. i

Fig. 4 is a perspective view illustrating another embodiment of the face rail.

Fig. 5 is a cross section of a curb and slab showing the sealing material extending the full depth of the slab.

Fig. 6 is a cross section illustrating another type of curb, with a modified face rail orform.

Figs. '7, 8 and 9 are end views of modified forms of face rails.

Referring to Figs. 1, 2 and 3, l designates the concrete road slab which is completed before the curb 2 at either side of the road is built, in accordance with the present invention, thereby enabling the slab 1 to be produced by the usual road forms, for purpose of convenience, and to enable the slab to be built and finished by modern road building machines which operate on the side forms or rails.

The curb 2 is formed with a groove 3 between it and the slab, in which a bituminous filler or other suitable sealing material 4 is deposited, thereby sealing the joint between the slab and curb so that water will not pass down between them.

The face of the curb 2 and groove 3 are produced by a face rail or form member 5 of sheet metal. Said rail may be of any suitable shape, according to the contour of curb face desired. The rail 5 has a bent back or doubled portion 6 to form the groove 3, and a flange '7 extends from the portion 6 to overlap and rest on the slab l. The rail 5 has an upstanding or outstanding flange 8 at its upper edge.

The back of the curb 2 is defined by the superposed back rails 9 and 10. The rail 9 has the base 11 provided with the upstanding flange or lip 12, and has the tread 13 provided with the depending flange or lip 14, while the upper rail 10 has the base'15 and tread 16.

An arched yoke 17 has a depending outer limb 18 to pass down through openings 19 in the treads l3 and 16 and base 15 of the back rails, and said yoke has the inner limb 20 to which is secured a plate 21 that is permanently or detachably secured to the face rail 5 in anysuitable manner, for supporting the face rail from the yoke. The face and back rails are thus spaced apart the desired distance, and the yoke is'supported by the back rails.

In order to conveniently clamp the upper rail 10 on the lower rail 9, an angular bracket or hanger 231s riveted or otherwise secured on thebase 15 of the rail 10, and a latch or clamping member 24 ispivoted between its ends, as at 25, to the depending bracket 23 and has opposite arms. The upper arm of the'clamping member 24 has a rounded end 26 to seat in the corner between theweb and tread of the rail 9, while the lower arm of the clamping member has a rounded end 27 to seat in the corner between the base 11 and flange or lip '12 of said rail 9, as seen in Fig. 3.

When the rail 10 is placed on the rail 9, with the'member 24 in a substantially horizontal position, said member may be turned on the pivot 25, so as to bind tightly by cam action within the rail 9, thereby firmly holding the rail 10 in position on the lower rail.

The form is set up with the flange '7 of the face rail bearing on the slab l, and the plastic material is then poured between the face and back rails to complete the curb 2, thereby producing the groove 3. The face rail 5, together with the yoke 17, may be removed before the concrete has completely set, to permit the face of the curb to be finished. The groove 3 is subsequently filled with pitch, a bituminous compound, or other suitable sealing material.

Fig. 4 shows an inclined face rail 5a to produce a battered curb face, and the rail has the bent back portion 6a and flange 7a, and is provided at its upper edge with the outturned flange 8a.

A wedge strip 34 is shown within the doubled portion 6a of the face rail in order to expand said portion to the desired width, so that the groove 3a between the slab 1a and curb 2a may be made wider. One or more wedges 35 may also be inserted under the flange 7a to space said flange above the slab la so as to regulate the depth of the groove'3a. V

The back rail 9a, as shown, is the full height of the curb, and an angle iron bar 17a is employed to support the face rail, a depending portion 20a being secured to the inner end of the bar 17a to support the face rail, said portion 20a being suitably secured, either detachably or permanently, with the face rail. A chair'31 seats on the tread 13a of the back. rail and supports the bar 17a, and a bolt 28 passes downwardly through said bar and chair and has a hook 29 to engage under the depending flange or lip 14a of the rail tread 15a. A nut 30 is threaded on the upper terminal of said bolt and seats on the bar 17a, to clamp the chair 31 on the rail, said chair being preferably secured to said bar.

The bar 17a projects outwardly beyond the back rail and is maintained in position by a stake 18a driven into the ground at the outer side of the form. The stake 18a and bar 17a have slots 33 receiving a clamping bolt 32, to permit of adjustmcnts. The wedges 35 may be omitted when the face rail is'supported by bars 17a.

The bar 17a, chair 31, bolt 28 and stake 18a correspond to the construction disclosed inmy Patent No. 1,628,316, granted May 10, 1927.

Fig. 5 illustrates the groove 3b-extending the full depth of the slab 11), so that the sealing material 413 between the slab and curb 2b'will also form a cushion therebetween as well as a seal. The groove, therefore, may be of any suit- I able depth. V 7

Fig. 6 illustrates a curb 2c havingv the widened base with the inwardly and outwardly extending ledges or portions 36 and 37, and the slab 1c is formed with a portion 38, extending over and overlapping the ledge 36.

With this type of curb, the curb is built first, and the slab is constructed later. A face rail 50 is placed against the face of the curb above the ledge 36, and has the bent back portion 60 and flange to produce a groove between the curb and slab. The rail 50 has an upper inturned flange 80. A back rail 9c may be placed against the back of the curb on the ledge 37 in order to support the road building or finishing machine employed to build and finish the slab 1c.

The type of curb shown in Fig. 6 is of particular advantage, in that it need not extend to a considerable depth below the slab, as seen in Fig. 4,-and the broad baseof the curb will lend a considerable bearing surface to support the curb in the ground. Furthermore, tilting of the curb away from the slab by wheels of vehicles bumping against the curb is avoided. Thus, when the and rail.

wheel of a vehicle strikes against the curb, tending to tilt the curb away from the slab, there is an upward pressure on the ledge 36 tending to raise it, which is resisted by the weight of the vehicle imposed on the slab 10, so that the overlapping portions 36 and 38 of the curb and slab will prevent the curb from tilting outwardly. The broad base of the curb also aids in preventing the tilting of the curb.

Fig. 7 shows a face rail 5d with a lower flange 7d and an upper flange 8d, and an angle iron 6d is'secured to the flange 703, to form a groove below said flange.

Fig. 8 illustrates a face rail 56 having an upper flange 86, without the doubled portion at its lower edge. The lower edge portion of the face rail is adapted to overlap the side of the slab, to produce a narrow groove or slit between the curb and slab.

Fig. 9 shows a similar face rail 5 having the upper flange 8], and having the lower bent back portion 6 with a wedge strip 34f therein. Said wedge strip may be removable or may be perma nentlysecured to. the rail 5f.

Having thus described the invention, what is claimed as new is:-

l. A cure face form rail having a lower portion to form a groove between a curb and a road slab and having a flange to overlap said slab, said portion extending downwardly from the flange.

2. A curb face form rail having a lower doubled portion to form a groove between a curb and a road slab. I

3. A curb face form rail having a lower doubled portion to form a groove between a curb and a road slaband having a flange to overlap said slab. a

4. A curb face form rail having a lower bent back portion provided with a flange to overlap a road slab, said portion extending downwardly from the flange to form a groove between the road slab and a curb molded against said slab 5. A curb form having face and back rails, the

face rail having a lower portion to form a groove between the curb and a road slab and having a flange to overlap said slab, saidportion extending downwardly from the flange. l 6. A curb form railfor providing a joint groove adjacent a road slab, said form rail having a curb face forming portion adapted to extend above the plane of a road slab and a groove form-- ing portion extending below the plane of the road slab.

7. A curb form rail for forming a curb face and a groove between a road slab and the curb, said rail comprising a curb face forming portion adapted to extend above the plane of the road slab and a groove forming portion adapted to ex tend below the plane of the slab, and means for supporting the aforesaid rail portions in operative position. I

JOHN N. HELTZEL. 

